Sintering, thermal stability and mechanical properties of ZrO2-WC composites obtained by pulsed electric current sintering

作     者：Shuigen HUANG Kim VANMEENSEL Omer VAN DER BLEST Jozef VLEUGELS 

作者机构：Department of Metallurgy and Materials Engineering Katholieke Universiteit Leuven Kasteelpark Arenberg 44 B-3001 Heverlee Belgium 

出 版 物：《Frontiers of Materials Science》 (材料学前沿（英文版）)

年 卷 期：2011年第5卷第1期

页      面：50-56页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Research Fund of K.U. Leuven under Project Fund for Scientific Research Flanders (FWO) under project number K. Vanmeensel thanks the Fund for Scientific Research Flanders (FWO) for his post-doctoral fellowship 

主　　题：ceramic composite pulsed electric current sintering (PECS) grain size,mechanical property 

摘      要：ZrO2-WC composites exhibit comparable mechanical properties as traditional WC-Co materials, which provides an opportunity to partially replace WC-Co for some applications. In this study, 2 mol.% Y2O3 stabilized ZrO2 composites with 40 vol.% WC were consolidated in the 1150℃-1850℃ range under a pressure of 60 MPa by pulsed electric current sintering （PECS）. The densification behavior, microstructure and phase constitution of the composites were investigated to clarify the role of the sintering temperature on the grain growth, mechanical properties and thermal stability of ZrO2 and WC components. Analysis results indicated that the composites sintered at 1350℃ and 1450℃ exhibited the highest tetragonal ZrO2 phase transformability, maximum toughness, and hardness and an optimal flexural strength. Chemical reaction of ZrO2 and C, originating from the graphite die, was detected in the composite PECS for 20 min at 1850℃ in vacuum.